EP0202273A1 - Dispositif permettant de couper des conducteurs avec un profil predetermine de composants electriques et/ou electroniques - Google Patents

Dispositif permettant de couper des conducteurs avec un profil predetermine de composants electriques et/ou electroniques

Info

Publication number
EP0202273A1
EP0202273A1 EP85905652A EP85905652A EP0202273A1 EP 0202273 A1 EP0202273 A1 EP 0202273A1 EP 85905652 A EP85905652 A EP 85905652A EP 85905652 A EP85905652 A EP 85905652A EP 0202273 A1 EP0202273 A1 EP 0202273A1
Authority
EP
European Patent Office
Prior art keywords
mechanisms
leads
gripper
tools
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85905652A
Other languages
German (de)
English (en)
Inventor
Mario Musiani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcotronics Ltd
Kemet Electronics Italia SRL
Original Assignee
Arcotronics Ltd
Arcotronics Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcotronics Ltd, Arcotronics Italia SpA filed Critical Arcotronics Ltd
Publication of EP0202273A1 publication Critical patent/EP0202273A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
    • H05K13/04—Mounting of components, e.g. of leadless components
    • H05K13/0473—Cutting and clinching the terminal ends of the leads after they are fitted on a circuit board

Definitions

  • This invention falls within the technical field of automatic .assembly of electrical and/or electronic components (e.g. transistors, diodes, condensers, resistors, etc.), in a corresponding substrate e.g. a printed circuit board; for this operation it is necessary for the leads of each component to be parallel with each other to permit and facilitate, simultaneous insertion of the leads in the corresponding acceptance holes in the printed circuit board.
  • electrical and/or electronic components e.g. transistors, diodes, condensers, resistors, etc.
  • Known cutting devices cause localised deformation and burrs in the cutting zone, forming a stem which is larger than the cross-sectional area occupied by the lead; in other terms, the cross-sectional area corresponding to the cutting zone is greater than the section of the lead, and in addition, varies in value as a function of the tools used for cutting, as well as the actual procedure used for cutting.
  • a further disadvantage of the known devices is that waste material is formed (fragments, metal powder, etc.) during cutting; this obliges manufacturers to provide means to pick up this waste, as if this falls on the printed circuit board, it is detrimental to mounting components on the printed circuit board.
  • An object of this invention is to provide a device to cut leads for electrical and/or electronic components in accordance with predetermined geometric profiles, where the cross-sectional area does not exceed the cross-section of the lead concerned.
  • the invention provides, in one aspect, a device for cutting leads of electrical and/or electronic components to a predetermined profile, having an operating station S at which gripper mechanisms carried by an intermittently driven conveyor come to rest, the leads of at least one of the said components being clamped by the mechanisms, the leads projecting in the same direction relative to the body of the component concerned (and) in relation to the gripper mechanisms, whereby they are oriented at the operating station S in a predetermined direction characterised in that the device comprises mechanisms to grasp the part of the leads external to the gripper mechanisms, means dependent on activation of the grasping mechanisms to move the mechanisms to apply tension to the leads and phase-related to the activating mechanisms of the gripper mechanisms; upper and lower cutting assemblies heads of which are provided with cutting tools and face the gripper mechanisms (with the latter stationary at the operating station S) and are positioned between the mechanisms and mechanisms the cutting assemblies being so constructed and arranged as to carry out, in the operation of the device, an initial crushing phase in one zone for each lead defining in each zone a predetermined profile, and a second phase
  • a preferred device embodying this invention produces components with leads of a predetermined length, following a cutting operation, dependent on the thickness of the printed circuit board concerned.
  • a preferred device embodying the invention is a multi-component device which can be integrated, with suitable phase-sequencing, with equipment for automatic assembly of leads on a printed circuit board, with a positive effect on the functional performance and reliability of said equipment.
  • Figure 1 shows a schematic side view, as a section, of a cutting device embodying the invention during the lead cutting phase
  • Figure 2 shows a schematic partial view of section I-I in Figure 1;
  • Figure 3 shows a schematic partial view of section II-II in Figure 1;
  • Figure 4. shows detail A of Figure 2. magnified;
  • Figure 5. shows a partial view of section III-III in Figure 4;
  • Figures 6a, ⁇ b show details B, C as per Figures 4 and 5 solely as regards the profile of the lead in the cutting zone, whereas Figure 6c shows the profiles of the lead parts after cutting;
  • Figures 7a, 7b show a variant of the device in question.
  • Figure 1 shows a carousel type conveyor 1, provided alongside gripper mechanisms 2, which comprise pincers with jaws 3a and 3b; the conveyor is motor-driven intermittently, (towards N) , by known components, not shown, so that it stops the gripper mechanisms 2 for a fixed period opposite an operating station S.
  • the function of gripper 2 is to clamp the leads
  • the upper assembly 4 consists of two tools 6, 7, a first and second respectively; the head of the first tool 6 (feather-edged) is in the form of a comb, hence with teeth 6a and grooves 6b ( Figure 5) ; the head of the second tool 7 is likewise in the form of a comb, (hence 0 with teeth 7a and grooves 7b) offset in relation to the comb of the first tool ( Figure 5) ; more precisely, the teeth of the one comb fit into the grooves of the other comb and vice versa.
  • teeth 7a of the second tool 7 5 extend beyond the grooves 6b of the first tool 6 (see Figure 4) : the advantages of this constructional detail can be seen from the following.
  • the lower assembly 5 consists of two tools 8, 9, the third and fourth respectively; the head of the third 0 tool 8 faces the head of the first tool 6, and is also in the form of a comb, with teeth and grooves constructed symmetrically, in a horizontal plane, in relation to teeth 6a and grooves 6b of tool 6.
  • the head of the fourth tool 9, which is facing 5 the head of the second tool 7, is likewise in the form of a comb so that it meshes with the comb of the third tool 8, as described for tools 6, 7.
  • bearings 17 keyed .to the outside, sliding inside a cam track 18 constructed in a disc 19 keyed onto a shaft 20.
  • the other tools 6, 8 (first and third tools) are also carried in a corresponding slide 14, sliding in the direction of slide 21, guided by one side of face 22 (forming a flat parallel surface) and the other side of the aforementioned slide 21, as can be seen in Figure 2; a similar number of pins 23 are secured to slides 14, inserted similarly in the above metal tubes 16, onto which bearings 24 are keyed, sliding in a cam track 25 constructed in the said disc 19 alongside track 18.
  • the profile of the cam tracks 18 and 25 is such that it moves the corresponding tools 7, 9 and 6, 8 in both directions Tl, T2; in particular, the said tracks force assemblies 4, 5 respectively to traverse in direction Tl and T2 until they are in contact with the relative heads (1st phase; see Figure 4) ; at this point, track 25 forces tools 6, 8 to halt while track 18 forces slight traversing of tools 7, 9, towards Tl, again with the relative heads in contact as described above (2nd phase) ; traversing of tools 7, 9 towards Tl (with the remaining tools 6, 8 locked) is possible due to play between the metal tubes 16 and pins 23.
  • the shaft 20 is made to rotate by a control shaft 26, by means of known mechanisms 26a, supported radially by carriage 30, an arm 27 being keyed onto the end of this shaft, and this arm being coupled to a tie rod 29, by means of joint 28, which in turn is coupled, by means of joint 31, to the end of a lever arm 32, the other end of which is supported on a fixed structure 33.
  • the lever arm 32 centrally supports the pin of a small roller 34 sliding in a cam track 35 (indicated partially by a broken line in Figure 1) constructed on the peripheral surface of a drum, not shown, carried by a main shaft 36 ( Figure 1) supported radially by the structure 33 and in constant rotation (direction M) via known mechanisms, not shown.
  • Rotation of the said drum causes oscillation of the arm 32 in a plane normal to the plane of Figure 1; this involves periodic oscillation of the control shaft 26, and hence of cam 19, following direction K_ and K., ( Figure 2) .
  • Carriage 30, and together with this, control shaft 26, are supported by wheels 37 sliding on rails 38 coupled to structure 33; this affords traversing of carriage 30, and together with this, control shaft 26, in directions Fl, F2. This traversing is achieved by means of a lever
  • the arm 39a of this lever supports a small roller 41 sliding in a track 42 (shown partially as a broken line) constructed on one side of disc 96, keyed onto the said shaft 36, whilst the remaining arm 39b contains a slot 43 within which a small roller 44 is coupled, supported radially by carriage 30.
  • lever 39 oscillates in relation to support 40; this moves the carriage 30 between two positions an operative position R (as in Figure 1) an inoperative position I respectively: as regards the latter, only the position assumed by arm 27 and the relative joint 28 are indicated in dash-line ( Figure 1) .
  • a gripper 45 At station S, downstream of the cutting assemblies 4, 5 (proceeding from the position Ql) is a gripper 45, the jaws of which 46, 47 are hinged respectively to a small frame 50 supported at 51 on carriage 30; these jaws are, in addition, mutually articulated at 88 as can be seen in Figure 2.
  • Activation of jaw 46 by means of a jack 48, determines the 'closed' and 'open' position of gripper 45.
  • the said frame 50 is activated by a pneumatic jack 52 which is supported at 53 on carriage 30.
  • the pincer of the gripper mechanism 2 is positioned, by means of a carousel conveyor, locked at station S (at position Ql to be precise) for a predetermined period.
  • a pyramidal profile 61 is formed, whilst on the opposite part (due to the teeth sections 7a of tool 7 projecting in relation to the grooves 6b of tool 6) a profile 62 is formed consisting of a crushed section 62a, with two tongues 62b branching off it, slightly inclined downwards (cf Figures 4 and 6a) .
  • This initial phase which does not involve the formation of waste material, primarily comprises crushing of zones 60 to create profiles 61, 62, as above; since there is contact with cutting tools, partial detachment of the profiles 61, 62 as above is also possible, at the same time as crushing.
  • the carousel conveyor 1 is again driven ⁇ to transfer component 11 with the leads 10, cut as above, from station S to another station (not shown) , and at the same time, feed the station S with a new component 11 whose leads 10 are to be cut identically to that described above, by means of a further gripper 2.
  • the device concerned can also cut components
  • mechanisms 80 are provided (e.g. punches and counter-punches, or suitable grippers) which deform lead 100b locally (the one projecting least from jaws 3a, 3b) to construct a small tooth 81 above this (more precisely in that part of the lead which is inside the jaws 3a, 3b - see Figure 7a) .
  • grippers 45a, 45b there are two grippers 45a, 45b, a first and a second one respectively, shown schematically (in that they are similar to gripper 45) , one of which grasps the lead 100a, and the other lead 100b.
  • Both the grippers 45a, 45b are supported by the said frame 50 and are activated by corresponding pneumatic jacks 48a, 48b, controlled in synchronization defining the 'open' and 'closed' positions for the jaws of the said grippers.
  • the unit formed by the second gripper 45b and associated jack 48b can traverse, in relation to frame 50, in direction E.
  • Activation of a jack 82 which is dependent on grasping of lead 100b by the second gripper 45b, in phase with partial release by jaws 3a, 3b of leads 100a, 100b, causes traversing of the said unit in the direction E, and sets it so that lead 100b is in tension, until the associated 'tooth' 81 strikes against the striker surface 55 on jaws 3a, 3b, of Figure 7b.
  • leads 100a, 100b project from the said head of body 11a of component 11 according to a predetermined value: the advantages below have already been reiterated above.
  • This device cuts leads according to a pyramidal profile 61, see Figures 6a, 6b, 6c; this profile does not extend beyond the cross-sectional area of the relative lead which, together with the fact that it is pointed, is extremely advantageous for insertion of the leads cut as above (hence with such profiles) in the corresponding holes in a printed circuit board; it has been shown that the above profile is obtained without forming waste material, other than portion 10c.
  • this device provides, once cutting is complete, leads of predetermined length in both of the constructional forms considered.
  • the activating mechanisms of the device are 'on' or Off type: important as regards interface with a microprocessor unit.
  • This device is universal, i.e. able to cut leads for components 11 independently of the distance between the leads up to a maximum dependent on the physical dimensions of the device; in addition, if the heads of tools 6, 7, 8, 9 are of an appropriate form, it is possible, by means of this device, to achieve pointed ends of a profile other than a pyramidal form.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Supply And Installment Of Electrical Components (AREA)
  • Wire Processing (AREA)

Abstract

Le dispositif est associé à une transporteuse (1) pourvue de mécanismes de serrage (2) qui positionnent les conducteurs (10) sur des composants (11) dans une station de fonctionnement (S). Le dispositif comprend des mécanismes (45) permettant de saisir les conducteurs positionnés dans ladite station (S), des moyens permettant de mettre les mécanismes (45) en tension, lesquels sont en relation de phase pour libérer partiellement les mécanismes de serrage (2) des conducteurs (10), dans le but d'effectuer un positionnement prédéterminé du corps (11a) des composants (11) vis-à-vis desdits mécanismes de serrage (2), et finalement des assemblages de coupe supérieur et inférieur (4, 5), respectivement, dont les têtes fonctionnent, dans la station S, dans une position entre les mécanismes de serrage (2) et les mécanismes de préhension (45). Les assemblages (4, 5) comprennent quatre outils (6, 7, 8, 9), deux pour chaque assemblage; ces quatre outils fonctionnent conjointement pour écraser une zone (60) du conducteur affectée par l'opération de coupe, deux de ces outils complétant la coupe de la zone (60), après l'écrasement, définissant ainsi un profil géométrique prédéterminé (61) dans la section de chaque zone (60).
EP85905652A 1984-11-20 1985-11-20 Dispositif permettant de couper des conducteurs avec un profil predetermine de composants electriques et/ou electroniques Withdrawn EP0202273A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT362784 1984-11-20
IT03627/84A IT1181253B (it) 1984-11-20 1984-11-20 Dispositivo per la recisione dei reofori di componenti elettrici e/o elettronici secondo un profilo prefissato

Publications (1)

Publication Number Publication Date
EP0202273A1 true EP0202273A1 (fr) 1986-11-26

Family

ID=11110854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905652A Withdrawn EP0202273A1 (fr) 1984-11-20 1985-11-20 Dispositif permettant de couper des conducteurs avec un profil predetermine de composants electriques et/ou electroniques

Country Status (4)

Country Link
EP (1) EP0202273A1 (fr)
JP (1) JPS62500976A (fr)
IT (1) IT1181253B (fr)
WO (1) WO1986003370A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101912933A (zh) * 2010-08-13 2010-12-15 深圳创维－Rgb电子有限公司 电子元器件自动插件的引脚剪切动刀
CN113013795B (zh) * 2021-04-28 2022-07-05 广东电网有限责任公司梅州供电局 一种剥线装置及剥线方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE427233C (de) * 1926-03-27 Carl Lehr Verfahren zur Herstellung von Naegeln aus Draht
US2982967A (en) * 1957-05-24 1961-05-09 Sperry Rand Corp Apparatus for installing components
FR2477786A1 (fr) * 1980-03-07 1981-09-11 Socapex Bande d'elements de contact a tenue en rive pour dispositif de connexion et procede de mise en oeuvre de tels elements de contact
JPS6056438A (ja) * 1983-09-06 1985-04-02 Howa:Kk マイナス形ねじドライバの製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8603370A1 *

Also Published As

Publication number Publication date
IT8403627A0 (it) 1984-11-20
WO1986003370A1 (fr) 1986-06-05
JPS62500976A (ja) 1987-04-16
IT1181253B (it) 1987-09-23

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Inventor name: MUSIANI, MARIO